From 13a5b5b4a3d8e487fb836e14185d61c03493ef0a Mon Sep 17 00:00:00 2001 From: Anton Babushkin Date: Thu, 30 Jan 2014 16:02:17 +0100 Subject: [PATCH] mc_att_control: major cleanup and code reorganization --- .../mc_att_control/mc_att_control_main.cpp | 716 ++++++++++-------- 1 file changed, 383 insertions(+), 333 deletions(-) diff --git a/src/modules/mc_att_control/mc_att_control_main.cpp b/src/modules/mc_att_control/mc_att_control_main.cpp index 44baccefc0..e37fe18b8f 100644 --- a/src/modules/mc_att_control/mc_att_control_main.cpp +++ b/src/modules/mc_att_control/mc_att_control_main.cpp @@ -113,28 +113,39 @@ private: bool _task_should_exit; /**< if true, sensor task should exit */ int _control_task; /**< task handle for sensor task */ - int _att_sub; /**< vehicle attitude subscription */ - int _att_sp_sub; /**< vehicle attitude setpoint */ - int _control_mode_sub; /**< vehicle control mode subscription */ - int _params_sub; /**< notification of parameter updates */ - int _manual_sub; /**< notification of manual control updates */ - int _arming_sub; /**< arming status of outputs */ + int _v_att_sub; /**< vehicle attitude subscription */ + int _v_att_sp_sub; /**< vehicle attitude setpoint subscription */ + int _v_rates_sp_sub; /**< vehicle rates setpoint subscription */ + int _v_control_mode_sub; /**< vehicle control mode subscription */ + int _params_sub; /**< parameter updates subscription */ + int _manual_control_sp_sub; /**< manual control setpoint subscription */ + int _armed_sub; /**< arming status subscription */ orb_advert_t _att_sp_pub; /**< attitude setpoint publication */ - orb_advert_t _rates_sp_pub; /**< rate setpoint publication */ - orb_advert_t _actuators_0_pub; /**< actuator control group 0 setpoint */ + orb_advert_t _v_rates_sp_pub; /**< rate setpoint publication */ + orb_advert_t _actuators_0_pub; /**< attitude actuator controls publication */ - struct vehicle_attitude_s _att; /**< vehicle attitude */ - struct vehicle_attitude_setpoint_s _att_sp; /**< vehicle attitude setpoint */ - struct manual_control_setpoint_s _manual; /**< r/c channel data */ - struct vehicle_control_mode_s _control_mode; /**< vehicle control mode */ - struct actuator_controls_s _actuators; /**< actuator control inputs */ - struct actuator_armed_s _arming; /**< actuator arming status */ - struct vehicle_rates_setpoint_s _rates_sp; /**< vehicle rates setpoint */ + struct vehicle_attitude_s _v_att; /**< vehicle attitude */ + struct vehicle_attitude_setpoint_s _v_att_sp; /**< vehicle attitude setpoint */ + struct vehicle_rates_setpoint_s _v_rates_sp; /**< vehicle rates setpoint */ + struct manual_control_setpoint_s _manual_control_sp; /**< manual control setpoint */ + struct vehicle_control_mode_s _v_control_mode; /**< vehicle control mode */ + struct actuator_controls_s _actuators; /**< actuator controls */ + struct actuator_armed_s _armed; /**< actuator arming status */ perf_counter_t _loop_perf; /**< loop performance counter */ - math::Vector<3> _rates_prev; /**< angular rates on previous step */ + math::Matrix<3, 3> _R_sp; /**< attitude setpoint rotation matrix */ + math::Matrix<3, 3> _R; /**< rotation matrix for current state */ + math::Vector<3> _rates_prev; /**< angular rates on previous step */ + math::Vector<3> _rates_sp; /**< angular rates setpoint */ + math::Vector<3> _rates_int; /**< angular rates integral error */ + float _thrust_sp; /**< thrust setpoint */ + math::Vector<3> _att_control; /**< attitude control vector */ + + math::Matrix<3, 3> I; /**< identity matrix */ + + bool _reset_yaw_sp; /**< reset yaw setpoint flag */ struct { param_t att_p; @@ -160,9 +171,9 @@ private: int parameters_update(); /** - * Update control outputs + * Check for parameter update and handle it. */ - void control_update(); + void parameter_update_poll(); /** * Check for changes in vehicle control mode. @@ -175,15 +186,30 @@ private: void vehicle_manual_poll(); /** - * Check for set triplet updates. + * Check for attitude setpoint updates. */ - void vehicle_setpoint_poll(); + void vehicle_attitude_setpoint_poll(); + + /** + * Check for rates setpoint updates. + */ + void vehicle_rates_setpoint_poll(); /** * Check for arming status updates. */ void arming_status_poll(); + /** + * Attitude controller. + */ + void control_attitude(float dt); + + /** + * Attitude rates controller. + */ + void control_attitude_rates(float dt); + /** * Shim for calling task_main from task_create. */ @@ -195,7 +221,7 @@ private: void task_main() __attribute__((noreturn)); }; -namespace att_control +namespace mc_att_control { /* oddly, ERROR is not defined for c++ */ @@ -213,34 +239,42 @@ MulticopterAttitudeControl::MulticopterAttitudeControl() : _control_task(-1), /* subscriptions */ - _att_sub(-1), - _att_sp_sub(-1), - _control_mode_sub(-1), + _v_att_sub(-1), + _v_att_sp_sub(-1), + _v_control_mode_sub(-1), _params_sub(-1), - _manual_sub(-1), - _arming_sub(-1), + _manual_control_sp_sub(-1), + _armed_sub(-1), /* publications */ _att_sp_pub(-1), - _rates_sp_pub(-1), + _v_rates_sp_pub(-1), _actuators_0_pub(-1), /* performance counters */ _loop_perf(perf_alloc(PC_ELAPSED, "fw att control")) { - memset(&_att, 0, sizeof(_att)); - memset(&_att_sp, 0, sizeof(_att_sp)); - memset(&_manual, 0, sizeof(_manual)); - memset(&_control_mode, 0, sizeof(_control_mode)); - memset(&_arming, 0, sizeof(_arming)); + memset(&_v_att, 0, sizeof(_v_att)); + memset(&_v_att_sp, 0, sizeof(_v_att_sp)); + memset(&_manual_control_sp, 0, sizeof(_manual_control_sp)); + memset(&_v_control_mode, 0, sizeof(_v_control_mode)); + memset(&_armed, 0, sizeof(_armed)); _params.p.zero(); _params.rate_p.zero(); _params.rate_i.zero(); _params.rate_d.zero(); + _R_sp.identity(); + _R.identity(); _rates_prev.zero(); + _rates_sp.zero(); + _rates_int.zero(); + _thrust_sp = 0.0f; + _att_control.zero(); + + I.identity(); _params_handles.att_p = param_find("MC_ATT_P"); _params_handles.yaw_p = param_find("MC_YAW_P"); @@ -276,7 +310,7 @@ MulticopterAttitudeControl::~MulticopterAttitudeControl() } while (_control_task != -1); } - att_control::g_control = nullptr; + mc_att_control::g_control = nullptr; } int @@ -312,42 +346,68 @@ MulticopterAttitudeControl::parameters_update() } void -MulticopterAttitudeControl::vehicle_control_mode_poll() +MulticopterAttitudeControl::parameter_update_poll() { - bool control_mode_updated; + bool updated; /* Check HIL state if vehicle status has changed */ - orb_check(_control_mode_sub, &control_mode_updated); + orb_check(_params_sub, &updated); - if (control_mode_updated) { + if (updated) { + struct parameter_update_s param_update; + orb_copy(ORB_ID(parameter_update), _params_sub, ¶m_update); + parameters_update(); + } +} - orb_copy(ORB_ID(vehicle_control_mode), _control_mode_sub, &_control_mode); +void +MulticopterAttitudeControl::vehicle_control_mode_poll() +{ + bool updated; + + /* Check HIL state if vehicle status has changed */ + orb_check(_v_control_mode_sub, &updated); + + if (updated) { + orb_copy(ORB_ID(vehicle_control_mode), _v_control_mode_sub, &_v_control_mode); } } void MulticopterAttitudeControl::vehicle_manual_poll() { - bool manual_updated; + bool updated; /* get pilots inputs */ - orb_check(_manual_sub, &manual_updated); + orb_check(_manual_control_sp_sub, &updated); - if (manual_updated) { + if (updated) { - orb_copy(ORB_ID(manual_control_setpoint), _manual_sub, &_manual); + orb_copy(ORB_ID(manual_control_setpoint), _manual_control_sp_sub, &_manual_control_sp); } } void -MulticopterAttitudeControl::vehicle_setpoint_poll() +MulticopterAttitudeControl::vehicle_attitude_setpoint_poll() { /* check if there is a new setpoint */ - bool att_sp_updated; - orb_check(_att_sp_sub, &att_sp_updated); + bool updated; + orb_check(_v_att_sp_sub, &updated); - if (att_sp_updated) { - orb_copy(ORB_ID(vehicle_attitude_setpoint), _att_sp_sub, &_att_sp); + if (updated) { + orb_copy(ORB_ID(vehicle_attitude_setpoint), _v_att_sp_sub, &_v_att_sp); + } +} + +void +MulticopterAttitudeControl::vehicle_rates_setpoint_poll() +{ + /* check if there is a new setpoint */ + bool updated; + orb_check(_v_rates_sp_sub, &updated); + + if (updated) { + orb_copy(ORB_ID(vehicle_rates_setpoint), _v_rates_sp_sub, &_v_rates_sp); } } @@ -355,351 +415,341 @@ void MulticopterAttitudeControl::arming_status_poll() { /* check if there is a new setpoint */ - bool arming_updated; - orb_check(_arming_sub, &arming_updated); + bool updated; + orb_check(_armed_sub, &updated); - if (arming_updated) { - orb_copy(ORB_ID(actuator_armed), _arming_sub, &_arming); + if (updated) { + orb_copy(ORB_ID(actuator_armed), _armed_sub, &_armed); + } +} + +/* + * Attitude controller. + * Input: 'manual_control_setpoint' and 'vehicle_attitude_setpoint' topics (depending on mode) + * Output: '_rates_sp' vector, '_thrust_sp', 'vehicle_attitude_setpoint' topic (for manual modes) + */ +void +MulticopterAttitudeControl::control_attitude(float dt) +{ + float yaw_sp_move_rate = 0.0f; + bool publish_att_sp = false; + + if (_v_control_mode.flag_control_manual_enabled) { + /* manual input, set or modify attitude setpoint */ + + if (_v_control_mode.flag_control_velocity_enabled || _v_control_mode.flag_control_climb_rate_enabled) { + /* in assisted modes poll 'vehicle_attitude_setpoint' topic and modify it */ + vehicle_attitude_setpoint_poll(); + } + + if (!_v_control_mode.flag_control_climb_rate_enabled) { + /* pass throttle directly if not in altitude stabilized mode */ + _v_att_sp.thrust = _manual_control_sp.throttle; + publish_att_sp = true; + } + + if (!_armed.armed) { + /* reset yaw setpoint when disarmed */ + _reset_yaw_sp = true; + } + + /* move yaw setpoint in all modes */ + if (_v_att_sp.thrust < 0.1f) { + // TODO + //if (_status.condition_landed) { + /* reset yaw setpoint if on ground */ + // reset_yaw_sp = true; + //} + } else { + if (_manual_control_sp.yaw < -YAW_DEADZONE || YAW_DEADZONE < _manual_control_sp.yaw) { + /* move yaw setpoint */ + yaw_sp_move_rate = _manual_control_sp.yaw; + _v_att_sp.yaw_body = _wrap_pi(_v_att_sp.yaw_body + yaw_sp_move_rate * dt); + _v_att_sp.R_valid = false; + publish_att_sp = true; + } + } + + /* reset yaw setpint to current position if needed */ + if (_reset_yaw_sp) { + _reset_yaw_sp = false; + _v_att_sp.yaw_body = _v_att.yaw; + _v_att_sp.R_valid = false; + publish_att_sp = true; + } + + if (!_v_control_mode.flag_control_velocity_enabled) { + /* update attitude setpoint if not in position control mode */ + _v_att_sp.roll_body = _manual_control_sp.roll; + _v_att_sp.pitch_body = _manual_control_sp.pitch; + _v_att_sp.R_valid = false; + publish_att_sp = true; + } + + } else { + /* in non-manual mode use 'vehicle_attitude_setpoint' topic */ + vehicle_attitude_setpoint_poll(); + + /* reset yaw setpoint after non-manual control mode */ + _reset_yaw_sp = true; + } + + _thrust_sp = _v_att_sp.thrust; + + /* construct attitude setpoint rotation matrix */ + if (_v_att_sp.R_valid) { + /* rotation matrix in _att_sp is valid, use it */ + _R_sp.set(&_v_att_sp.R_body[0][0]); + + } else { + /* rotation matrix in _att_sp is not valid, use euler angles instead */ + _R_sp.from_euler(_v_att_sp.roll_body, _v_att_sp.pitch_body, _v_att_sp.yaw_body); + + /* copy rotation matrix back to setpoint struct */ + memcpy(&_v_att_sp.R_body[0][0], &_R_sp.data[0][0], sizeof(_v_att_sp.R_body)); + _v_att_sp.R_valid = true; + } + + /* publish the attitude setpoint if needed */ + if (publish_att_sp) { + _v_att_sp.timestamp = hrt_absolute_time(); + + if (_att_sp_pub > 0) { + orb_publish(ORB_ID(vehicle_attitude_setpoint), _att_sp_pub, &_v_att_sp); + + } else { + _att_sp_pub = orb_advertise(ORB_ID(vehicle_attitude_setpoint), &_v_att_sp); + } + } + + /* rotation matrix for current state */ + _R.set(_v_att.R); + + /* all input data is ready, run controller itself */ + + /* try to move thrust vector shortest way, because yaw response is slower than roll/pitch */ + math::Vector<3> R_z(_R(0, 2), _R(1, 2), _R(2, 2)); + math::Vector<3> R_sp_z(_R_sp(0, 2), _R_sp(1, 2), _R_sp(2, 2)); + + /* axis and sin(angle) of desired rotation */ + math::Vector<3> e_R = _R.transposed() * (R_z % R_sp_z); + + /* calculate angle error */ + float e_R_z_sin = e_R.length(); + float e_R_z_cos = R_z * R_sp_z; + + /* calculate weight for yaw control */ + float yaw_w = _R_sp(2, 2) * _R_sp(2, 2); + + /* calculate rotation matrix after roll/pitch only rotation */ + math::Matrix<3, 3> R_rp; + + if (e_R_z_sin > 0.0f) { + /* get axis-angle representation */ + float e_R_z_angle = atan2f(e_R_z_sin, e_R_z_cos); + math::Vector<3> e_R_z_axis = e_R / e_R_z_sin; + + e_R = e_R_z_axis * e_R_z_angle; + + /* cross product matrix for e_R_axis */ + math::Matrix<3, 3> e_R_cp; + e_R_cp.zero(); + e_R_cp(0, 1) = -e_R_z_axis(2); + e_R_cp(0, 2) = e_R_z_axis(1); + e_R_cp(1, 0) = e_R_z_axis(2); + e_R_cp(1, 2) = -e_R_z_axis(0); + e_R_cp(2, 0) = -e_R_z_axis(1); + e_R_cp(2, 1) = e_R_z_axis(0); + + /* rotation matrix for roll/pitch only rotation */ + R_rp = _R * (I + e_R_cp * e_R_z_sin + e_R_cp * e_R_cp * (1.0f - e_R_z_cos)); + + } else { + /* zero roll/pitch rotation */ + R_rp = _R; + } + + /* R_rp and _R_sp has the same Z axis, calculate yaw error */ + math::Vector<3> R_sp_x(_R_sp(0, 0), _R_sp(1, 0), _R_sp(2, 0)); + math::Vector<3> R_rp_x(R_rp(0, 0), R_rp(1, 0), R_rp(2, 0)); + e_R(2) = atan2f((R_rp_x % R_sp_x) * R_sp_z, R_rp_x * R_sp_x) * yaw_w; + + if (e_R_z_cos < 0.0f) { + /* for large thrust vector rotations use another rotation method: + * calculate angle and axis for R -> R_sp rotation directly */ + math::Quaternion q; + q.from_dcm(_R.transposed() * _R_sp); + math::Vector<3> e_R_d = q.imag(); + e_R_d.normalize(); + e_R_d *= 2.0f * atan2f(e_R_d.length(), q(0)); + + /* use fusion of Z axis based rotation and direct rotation */ + float direct_w = e_R_z_cos * e_R_z_cos * yaw_w; + e_R = e_R * (1.0f - direct_w) + e_R_d * direct_w; + } + + /* calculate angular rates setpoint */ + _rates_sp = _params.p.emult(e_R); + + /* feed forward yaw setpoint rate */ + _rates_sp(2) += yaw_sp_move_rate * yaw_w; +} + +/* + * Attitude rates controller. + * Input: '_rates_sp' vector, '_thrust_sp' + * Output: '_att_control' vector + */ +void +MulticopterAttitudeControl::control_attitude_rates(float dt) +{ + /* reset integral if disarmed */ + if (!_armed.armed) { + _rates_int.zero(); + } + + /* current body angular rates */ + math::Vector<3> rates; + rates(0) = _v_att.rollspeed; + rates(1) = _v_att.pitchspeed; + rates(2) = _v_att.yawspeed; + + /* angular rates error */ + math::Vector<3> rates_err = _rates_sp - rates; + _att_control = _params.rate_p.emult(rates_err) + _params.rate_d.emult(_rates_prev - rates) / dt + _rates_int; + _rates_prev = rates; + + /* update integral only if not saturated on low limit */ + if (_thrust_sp > 0.1f && _att_control.length() < _thrust_sp) { + for (int i = 0; i < 3; i++) { + float rate_i = _rates_int(i) + _params.rate_i(i) * rates_err(i) * dt; + + if (isfinite(rate_i) && rate_i > -RATES_I_LIMIT && rate_i < RATES_I_LIMIT && + _att_control(i) > -RATES_I_LIMIT && _att_control(i) < RATES_I_LIMIT) { + _rates_int(i) = rate_i; + } + } } } void MulticopterAttitudeControl::task_main_trampoline(int argc, char *argv[]) { - att_control::g_control->task_main(); + mc_att_control::g_control->task_main(); } void MulticopterAttitudeControl::task_main() { - /* inform about start */ warnx("started"); fflush(stdout); /* * do subscriptions */ - _att_sp_sub = orb_subscribe(ORB_ID(vehicle_attitude_setpoint)); - _att_sub = orb_subscribe(ORB_ID(vehicle_attitude)); - _control_mode_sub = orb_subscribe(ORB_ID(vehicle_control_mode)); + _v_att_sp_sub = orb_subscribe(ORB_ID(vehicle_attitude_setpoint)); + _v_rates_sp_sub = orb_subscribe(ORB_ID(vehicle_rates_setpoint)); + _v_att_sub = orb_subscribe(ORB_ID(vehicle_attitude)); + _v_control_mode_sub = orb_subscribe(ORB_ID(vehicle_control_mode)); _params_sub = orb_subscribe(ORB_ID(parameter_update)); - _manual_sub = orb_subscribe(ORB_ID(manual_control_setpoint)); - _arming_sub = orb_subscribe(ORB_ID(actuator_armed)); + _manual_control_sp_sub = orb_subscribe(ORB_ID(manual_control_setpoint)); + _armed_sub = orb_subscribe(ORB_ID(actuator_armed)); - /* rate limit attitude updates to 100Hz */ - orb_set_interval(_att_sub, 10); + /* rate limit attitude updates to 200Hz, failsafe against spam, normally runs at the same rate as attitude estimator */ + orb_set_interval(_v_att_sub, 5); + /* initialize parameters cache */ parameters_update(); - /* initialize values of critical structs until first regular update */ - _arming.armed = false; + /* wakeup source: vehicle attitude */ + struct pollfd fds[1]; - /* get an initial update for all sensor and status data */ - vehicle_setpoint_poll(); - vehicle_control_mode_poll(); - vehicle_manual_poll(); - arming_status_poll(); - - /* setpoint rotation matrix */ - math::Matrix<3, 3> R_sp; - R_sp.identity(); - - /* rotation matrix for current state */ - math::Matrix<3, 3> R; - R.identity(); - - /* current angular rates */ - math::Vector<3> rates; - rates.zero(); - - /* angular rates integral error */ - math::Vector<3> rates_int; - rates_int.zero(); - - /* identity matrix */ - math::Matrix<3, 3> I; - I.identity(); - - math::Quaternion q; - - bool reset_yaw_sp = true; - - /* wakeup source(s) */ - struct pollfd fds[2]; - - /* Setup of loop */ - fds[0].fd = _params_sub; + fds[0].fd = _v_att_sub; fds[0].events = POLLIN; - fds[1].fd = _att_sub; - fds[1].events = POLLIN; while (!_task_should_exit) { - /* wait for up to 500ms for data */ + /* wait for up to 100ms for data */ int pret = poll(&fds[0], (sizeof(fds) / sizeof(fds[0])), 100); - /* timed out - periodic check for _task_should_exit, etc. */ + /* timed out - periodic check for _task_should_exit */ if (pret == 0) continue; /* this is undesirable but not much we can do - might want to flag unhappy status */ if (pret < 0) { warn("poll error %d, %d", pret, errno); + /* sleep a bit before next try */ + usleep(100000); continue; } perf_begin(_loop_perf); - /* only update parameters if they changed */ + /* run controller on attitude changes */ if (fds[0].revents & POLLIN) { - /* copy the topic to clear updated flag */ - struct parameter_update_s update; - orb_copy(ORB_ID(parameter_update), _params_sub, &update); - - parameters_update(); - } - - /* only run controller if attitude changed */ - if (fds[1].revents & POLLIN) { static uint64_t last_run = 0; float dt = (hrt_absolute_time() - last_run) / 1000000.0f; last_run = hrt_absolute_time(); - /* guard against too large dt's */ - if (dt > 0.02f) + /* guard against too small (< 2ms) and too large (> 20ms) dt's */ + if (dt < 0.002f) { + dt = 0.002f; + + } else if (dt > 0.02f) { dt = 0.02f; + } /* copy attitude topic */ - orb_copy(ORB_ID(vehicle_attitude), _att_sub, &_att); + orb_copy(ORB_ID(vehicle_attitude), _v_att_sub, &_v_att); - vehicle_setpoint_poll(); + /* check for updates in other topics */ + parameter_update_poll(); vehicle_control_mode_poll(); arming_status_poll(); vehicle_manual_poll(); - float yaw_sp_move_rate = 0.0f; - bool publish_att_sp = false; + if (_v_control_mode.flag_control_attitude_enabled) { + control_attitude(dt); - /* define which input is the dominating control input */ - if (_control_mode.flag_control_manual_enabled) { - /* manual input */ - if (!_control_mode.flag_control_climb_rate_enabled) { - /* pass throttle directly if not in altitude control mode */ - _att_sp.thrust = _manual.throttle; - } + /* publish attitude rates setpoint */ + _v_rates_sp.roll = _rates_sp(0); + _v_rates_sp.pitch = _rates_sp(1); + _v_rates_sp.yaw = _rates_sp(2); + _v_rates_sp.thrust = _thrust_sp; + _v_rates_sp.timestamp = hrt_absolute_time(); - if (!_arming.armed) { - /* reset yaw setpoint when disarmed */ - reset_yaw_sp = true; - } - - if (_control_mode.flag_control_attitude_enabled) { - /* control attitude, update attitude setpoint depending on mode */ - - if (_att_sp.thrust < 0.1f) { - // TODO - //if (_status.condition_landed) { - /* reset yaw setpoint if on ground */ - // reset_yaw_sp = true; - //} - } else { - if (_manual.yaw < -YAW_DEADZONE || YAW_DEADZONE < _manual.yaw) { - /* move yaw setpoint */ - yaw_sp_move_rate = _manual.yaw; - _att_sp.yaw_body = _wrap_pi(_att_sp.yaw_body + yaw_sp_move_rate * dt); - _att_sp.R_valid = false; - publish_att_sp = true; - } - } - - /* reset yaw setpint to current position if needed */ - if (reset_yaw_sp) { - reset_yaw_sp = false; - _att_sp.yaw_body = _att.yaw; - _att_sp.R_valid = false; - publish_att_sp = true; - } - - if (!_control_mode.flag_control_velocity_enabled) { - /* update attitude setpoint if not in position control mode */ - _att_sp.roll_body = _manual.roll; - _att_sp.pitch_body = _manual.pitch; - _att_sp.R_valid = false; - publish_att_sp = true; - } + if (_v_rates_sp_pub > 0) { + orb_publish(ORB_ID(vehicle_rates_setpoint), _v_rates_sp_pub, &_v_rates_sp); } else { - /* manual rate inputs (ACRO) */ - // TODO - /* reset yaw setpoint after ACRO */ - reset_yaw_sp = true; + _v_rates_sp_pub = orb_advertise(ORB_ID(vehicle_rates_setpoint), &_v_rates_sp); } } else { - /* reset yaw setpoint after non-manual control */ - reset_yaw_sp = true; + /* attitude controller disabled */ + // TODO poll 'attitude_rates_setpoint' topic + _rates_sp.zero(); + _thrust_sp = 0.0f; } - if (_att_sp.R_valid) { - /* rotation matrix in _att_sp is valid, use it */ - R_sp.set(&_att_sp.R_body[0][0]); + if (_v_control_mode.flag_control_rates_enabled) { + control_attitude_rates(dt); - } else { - /* rotation matrix in _att_sp is not valid, use euler angles instead */ - R_sp.from_euler(_att_sp.roll_body, _att_sp.pitch_body, _att_sp.yaw_body); + /* publish actuator controls */ + _actuators.control[0] = (isfinite(_att_control(0))) ? _att_control(0) : 0.0f; + _actuators.control[1] = (isfinite(_att_control(1))) ? _att_control(1) : 0.0f; + _actuators.control[2] = (isfinite(_att_control(2))) ? _att_control(2) : 0.0f; + _actuators.control[3] = (isfinite(_thrust_sp)) ? _thrust_sp : 0.0f; + _actuators.timestamp = hrt_absolute_time(); - /* copy rotation matrix back to setpoint struct */ - memcpy(&_att_sp.R_body[0][0], &R_sp.data[0][0], sizeof(_att_sp.R_body)); - _att_sp.R_valid = true; - } - - if (publish_att_sp) { - /* publish the attitude setpoint */ - _att_sp.timestamp = hrt_absolute_time(); - - if (_att_sp_pub > 0) { - orb_publish(ORB_ID(vehicle_attitude_setpoint), _att_sp_pub, &_att_sp); + if (_actuators_0_pub > 0) { + orb_publish(ORB_ID(actuator_controls_0), _actuators_0_pub, &_actuators); } else { - _att_sp_pub = orb_advertise(ORB_ID(vehicle_attitude_setpoint), &_att_sp); + _actuators_0_pub = orb_advertise(ORB_ID(actuator_controls_0), &_actuators); } } - - /* rotation matrix for current state */ - R.set(_att.R); - - /* current body angular rates */ - rates(0) = _att.rollspeed; - rates(1) = _att.pitchspeed; - rates(2) = _att.yawspeed; - - /* try to move thrust vector shortest way, because yaw response is slower than roll/pitch */ - math::Vector<3> R_z(R(0, 2), R(1, 2), R(2, 2)); - math::Vector<3> R_sp_z(R_sp(0, 2), R_sp(1, 2), R_sp(2, 2)); - - /* axis and sin(angle) of desired rotation */ - math::Vector<3> e_R = R.transposed() * (R_z % R_sp_z); - - /* calculate angle error */ - float e_R_z_sin = e_R.length(); - float e_R_z_cos = R_z * R_sp_z; - - /* calculate weight for yaw control */ - float yaw_w = R_sp(2, 2) * R_sp(2, 2); - - /* calculate rotation matrix after roll/pitch only rotation */ - math::Matrix<3, 3> R_rp; - - if (e_R_z_sin > 0.0f) { - /* get axis-angle representation */ - float e_R_z_angle = atan2f(e_R_z_sin, e_R_z_cos); - math::Vector<3> e_R_z_axis = e_R / e_R_z_sin; - - e_R = e_R_z_axis * e_R_z_angle; - - /* cross product matrix for e_R_axis */ - math::Matrix<3, 3> e_R_cp; - e_R_cp.zero(); - e_R_cp(0, 1) = -e_R_z_axis(2); - e_R_cp(0, 2) = e_R_z_axis(1); - e_R_cp(1, 0) = e_R_z_axis(2); - e_R_cp(1, 2) = -e_R_z_axis(0); - e_R_cp(2, 0) = -e_R_z_axis(1); - e_R_cp(2, 1) = e_R_z_axis(0); - - /* rotation matrix for roll/pitch only rotation */ - R_rp = R * (I + e_R_cp * e_R_z_sin + e_R_cp * e_R_cp * (1.0f - e_R_z_cos)); - - } else { - /* zero roll/pitch rotation */ - R_rp = R; - } - - /* R_rp and R_sp has the same Z axis, calculate yaw error */ - math::Vector<3> R_sp_x(R_sp(0, 0), R_sp(1, 0), R_sp(2, 0)); - math::Vector<3> R_rp_x(R_rp(0, 0), R_rp(1, 0), R_rp(2, 0)); - e_R(2) = atan2f((R_rp_x % R_sp_x) * R_sp_z, R_rp_x * R_sp_x) * yaw_w; - - if (e_R_z_cos < 0.0f) { - /* for large thrust vector rotations use another rotation method: - * calculate angle and axis for R -> R_sp rotation directly */ - q.from_dcm(R.transposed() * R_sp); - math::Vector<3> e_R_d = q.imag(); - e_R_d.normalize(); - e_R_d *= 2.0f * atan2f(e_R_d.length(), q(0)); - - /* use fusion of Z axis based rotation and direct rotation */ - float direct_w = e_R_z_cos * e_R_z_cos * yaw_w; - e_R = e_R * (1.0f - direct_w) + e_R_d * direct_w; - } - - /* angular rates setpoint*/ - math::Vector<3> rates_sp = _params.p.emult(e_R); - - /* feed forward yaw setpoint rate */ - rates_sp(2) += yaw_sp_move_rate * yaw_w; - - /* reset integral if disarmed */ - // TODO add LANDED flag here - if (!_arming.armed) { - rates_int.zero(); - } - - /* rate controller */ - math::Vector<3> rates_err = rates_sp - rates; - math::Vector<3> control = _params.rate_p.emult(rates_err) + _params.rate_d.emult(_rates_prev - rates) / fmaxf(dt, 0.003f) + rates_int; - _rates_prev = rates; - - /* update integral */ - for (int i = 0; i < 3; i++) { - float rate_i = rates_int(i) + _params.rate_i(i) * rates_err(i) * dt; - - if (isfinite(rate_i)) { - if (rate_i > -RATES_I_LIMIT && rate_i < RATES_I_LIMIT && control(i) > -RATES_I_LIMIT && control(i) < RATES_I_LIMIT) { - rates_int(i) = rate_i; - } - } - } - - /* publish the attitude rates setpoint */ - _rates_sp.roll = rates_sp(0); - _rates_sp.pitch = rates_sp(1); - _rates_sp.yaw = rates_sp(2); - _rates_sp.thrust = _att_sp.thrust; - _rates_sp.timestamp = hrt_absolute_time(); - - if (_rates_sp_pub > 0) { - orb_publish(ORB_ID(vehicle_rates_setpoint), _rates_sp_pub, &_rates_sp); - - } else { - _rates_sp_pub = orb_advertise(ORB_ID(vehicle_rates_setpoint), &_rates_sp); - } - - /* publish the attitude controls */ - if (_control_mode.flag_control_rates_enabled) { - _actuators.control[0] = (isfinite(control(0))) ? control(0) : 0.0f; - _actuators.control[1] = (isfinite(control(1))) ? control(1) : 0.0f; - _actuators.control[2] = (isfinite(control(2))) ? control(2) : 0.0f; - _actuators.control[3] = (isfinite(_rates_sp.thrust)) ? _rates_sp.thrust : 0.0f; - _actuators.timestamp = hrt_absolute_time(); - - } else { - /* controller disabled, publish zero attitude controls */ - _actuators.control[0] = 0.0f; - _actuators.control[1] = 0.0f; - _actuators.control[2] = 0.0f; - _actuators.control[3] = 0.0f; - _actuators.timestamp = hrt_absolute_time(); - } - - if (_actuators_0_pub > 0) { - /* publish the attitude setpoint */ - orb_publish(ORB_ID(actuator_controls_0), _actuators_0_pub, &_actuators); - - } else { - /* advertise and publish */ - _actuators_0_pub = orb_advertise(ORB_ID(actuator_controls_0), &_actuators); - } } perf_end(_loop_perf); @@ -739,17 +789,17 @@ int mc_att_control_main(int argc, char *argv[]) if (!strcmp(argv[1], "start")) { - if (att_control::g_control != nullptr) + if (mc_att_control::g_control != nullptr) errx(1, "already running"); - att_control::g_control = new MulticopterAttitudeControl; + mc_att_control::g_control = new MulticopterAttitudeControl; - if (att_control::g_control == nullptr) + if (mc_att_control::g_control == nullptr) errx(1, "alloc failed"); - if (OK != att_control::g_control->start()) { - delete att_control::g_control; - att_control::g_control = nullptr; + if (OK != mc_att_control::g_control->start()) { + delete mc_att_control::g_control; + mc_att_control::g_control = nullptr; err(1, "start failed"); } @@ -757,16 +807,16 @@ int mc_att_control_main(int argc, char *argv[]) } if (!strcmp(argv[1], "stop")) { - if (att_control::g_control == nullptr) + if (mc_att_control::g_control == nullptr) errx(1, "not running"); - delete att_control::g_control; - att_control::g_control = nullptr; + delete mc_att_control::g_control; + mc_att_control::g_control = nullptr; exit(0); } if (!strcmp(argv[1], "status")) { - if (att_control::g_control) { + if (mc_att_control::g_control) { errx(0, "running"); } else {